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Finding the Fourth Proportional to 2,698.70, 3,723.72 and 1,636.22

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Solution

The fourth proportional to 2,698.70, 3,723.72 and 1,636.22 is: 2,257.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,698.70 : 3,723.72 = 1,636.22 : x
  2. Step 2: Convert to fraction form
    2,698.70/3,723.72 = 1,636.22/x
  3. Step 3: Cross multiply
    2,698.70x = 3,723.72 × 1,636.22
  4. Step 4: Simplify right side
    2,698.70x = 6,092,825.14
  5. Step 5: Solve for x
    x = 6,092,825.14/2,698.70
  6. Step 6: Final answer
    x = 2,257.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.